Progressive cut-out mechanism.



J. H. HALL.

PROGRESSIVE GUT-OUT MECHANISM.

APPLICATION rum) MAR. 18, 1908.

Patented Oct. 6, 1908.

3 SHEETS-SHEET 1.

w y g WIT ESSES: |NVENTOR J. H. HALL. PROGRESSIVE GUT-OUT MECHANISM.

APPLIOATION FILED MAR. 18, 1908. Patented Oct 6,

3 SHEETS-SHEET 2.

Ilium II h wfTff'isz fill I Z Z ATTORNEY J. E. HALL.

PROGRESSIVE GUT-OUT MECHANISM.

APPLICATION FILED MAR. 18, 190B.

Patented 061; 6, 1908.

3 SHEETS-SHEET 3.

WITNESSES: mvsu-rofi ATTORN EV UNITED STATES PATENT OFFICE.

JAY H. HALL, OF NEW YORK, N. Y., ASSIGNOR TO THE ELECTRIC CONTROLLER ANDSUPPL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

PROGRESSIVE CU T-OUT MECHANISM.

Specification of Letters Patent.

; Patented Oct. 6, 1908.

i L Applicationflled March 18, 1908. Serial No. 5121,939.

To all whom 'it may coiicern:

Be it known that I, J A H. HALL, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented or discovered new and useful Improvements in ProgressiveCut-Out Mechanism, of-which the followingis a specification.

In orderto provide a uniform distribu-' 'tion of the material chargedinto a blast furnace, the furnace top' is sometimes so made that it canbe revolved through a larger or smaller angle after each skip-load has"been deposited upon the usual bell in the top. Such an angle ofrevolution can be selected that the successive charges may be dischargedinto the furnace at any desired number of degrees from adjacent char es.If the skip always dumps the material into the top at the zero point,the top may be revolved 85 and the material dropped into the furnace.The next skip-load is, after having been deposited in the bell,.revolved170 and dropped; the third is revolved 255% be a space of 5 between theadjacent charges. If each angle of movement is 87 instead of 85, thecharges will be spaced 3 apart and there will be 120 movements or stepsbefore a cycle is completed. Similarly, if the angle of movement is 89,the charges will be spaced1 apart and there will be, 360

movements or steps before completing a cycle.

My invention is a device which will auto-- matically stop a revolvingmechanism so that any desired angle may be included be--,

tween two successive stops.

I shall describe the device as used in connection with-an electriccontroller operating 21;.ii10t01 which drives the revolving mechan-"-ism of a blast furnace top. Its uses are not *limited to a blastfurnace top only but it may be applied to any mechanism movingthroughany given cycle.

Figure 1 is acdiagrammatical representation of one form of my inventionfor use with a non-reversing motor; Fig. 2, a vertical 4 section throughthe cut-out mechanism for use with the invention shown in Fig. 1;

Fig. 3, a diagram of a second form of my invention for use with areversing motor; and Fig. 4, a vertical section of the cut-out mechanismfor use with the invention shown in Fi 3. v

Referring first to Figs. 1 and 2, S, S and S represent a set ofmagnetically operated starting or acceleration switches, having therespective windings 8', s and s for actuating the respective switch armsa, s and 8, arranged to engage with the fixed contacts s s and 8,respectively]. The fixed 'contact 5- is connected by the wire 8 to themovable.

contacts 8'' and s. The movable contact 8* is connected to the positiveside of the main switch S by the wire 8,- and the fixed contacts 8 and sare connected by the wires s and s to opposite ends of the startingresistance R, its middlepoint being connected by the wire 8 to the fixedcontact 8*.

M is a motor having its armature m in series with the series fieldwinding 1n, connected to the negative side of the main switch S by thewire 8 Iv also provide the shunt winding m bridged across the mains .beitween the wire 8 and the wire 8 by means of the wire 8 1 The remainingend of the armature winding is connected to the negative end of theresistance R through the winding C of the'magnetic clutch J, the ends ofthe winding C being joined by the brushes 0 and 0 to the rings 0 and 0on the hub of the clutch (Fig. 2).

I provide the throttle H, actuated by the winding h, bridged by the wire8" on the wire .9 and the variable resistance R, which has one endconnected to the resistance R by a movable connection, these features.being shown and described in A. C. Eastwoods' patent, N0.8G7,81 0,granted October 8, 1907.

The auxiliary contact h of the throttle H is connected through theresistances r and r to the lower ends of the windings s and is The lowerend of and also to the wire .9 the winding 8 is also connected to theauxiliary contact if and the auxiliary con tact 8 while the lower end ofthe winding s is connected to the auxiliary contact 8 the contacts- 8and 8 being the'coil C and the rings and c represented by the smallletter closed by the auxiliary switch 8 when the switch S closed. Theupper ends of the windings s and 8 are connected respectively, to thewires 5 and 8 K and P represent sections of my cut-out mechanism, theparts of the sect n K being 1 with exponents, and the parts of thesection P by the small letter 7) with exponents.

70 represents a shaft connected to that portion of the magnetic clutch Jwhich contains The top of the shaft k has pinned thereonthe arm it:which carries the brush 70 arranged to contact with the two concentriccontacts 70 and 70 the former being a complete ring and the latter beingbroken or interrupted at'the point 70.

'p is a shaft parallel to the shaft is, the two said shafts beingconnected together by the spur-gearsk and p or by any other suitabletransmission mechanism. The shaft has loosely mounted thereon the armlatter from left to right.

of the motor L is connected to the gear is by carrying the insulatedbrush p arranged to connect togetherthe concentric contacts p and p, theformer bein broken into six equal sections p to p, t e sections beingseparated slightly but alternately electrically connected by the wires7) and 79 so placed as not to be engaged by the brush 7). The contact pis a complete ring. The shaft 19 has the arm 19 secured thereto by apin, the arm having thereon a pendent portion arranged behind the arm pto drive the The armature Z,

the pinion 12 on the saidshaft." The upper endiof the winding .9 iconnected by the wire 4: to the contact 19 aTiid the positive side ofthe switch S is connected by the wire 5- to the contacts The wire 3 isconnected by the wire 6 through the field winding Z of the motor L tothe contact 70 and the remainingend of the armature Z, the resistance Ebeing between the armature and the junction of the wires 8 and 6'. Thelong stationary contact strip n of the master controller N is connectedto the wire 3, which is connected to the negative side of the switch S.v The contact at of the master controller N is connected by the wire 1to the wire. 10, and the contact 12 is connected by the wire 2 to thewire p The arm or handle n of the controller has the brush 12, arrangedto-connect the strip n to the strip 11/ or 11 G isa shaft v hi h carriesthe second member of the magnetic clutch J and is connected at its lowerend to any mechanism which angular or other movement it is desired tocontrol according to the principles hereinbefore stated or according toprinciples derivable tlr refrom. I may for the sake of definitenessassume that the shaft G is cohnected to a furnace top rotatable by themotor M so-as Z to give the shaft and furnace top the same angularmovement; that is, the same number oflrevolutions per minute.

The arrangement of the wiring shown on Fig. l is for a non-reversingcontroller, since each move of the driving motor is always in the samedirection. If the arm n be moved {.to bring the brush n on the contactat, the following circuit will exist; from the positive main through thewire .9, the winding 8, the wire 4, the contact 77 the brush p thecontact 79, thewires 15 and 1, the contact negative main. Theenergization of the circuit as follows: from the positive main throughthe'- wire .9, movable and fixed contacts s and s, the wire 8, all ofthe resistance R, the clutch winding C, the armature m of the motor M,the series field m, and the wire 8 to the negative main. This circuitcauses the rotation of the motor M and consequently of the shaft G. Asthe circuit of the clutch winding G is also closed the shaft 10 will becaused to rotate with the shaft G.

As soon as the speed of the motor is such as to make it safe to cut-outthe first section of the resistance R (which will not be until thecurrent through the winding h permits the contacts h and ll? to beclosed), a circuit is set up from the resistance R through the wiresfithe winding 8 the contacts k and h, and the wire 8 to the negativemain. This circuit closes the switch S and causes the first sect-ion ofthe resistance R to be shunted through the wire 8 the contacts 8 and sand the wire 8 to the second section of the said resistance. As thewinding 8 is in the circuit of the contact h and k as the throttle H maybe lifted as soon as the switch S has been closed, the winding .3 isstill kept energized by the small current flowing through the resistance'1', which is so adjusted as not to short-circuit the winding 5 but topermit enough current to flow through it to hold the switch S? closedthough never permitting enough current to pass to close the switch whenopen. The switch S is closed when the motor current is bridge thecontacts h and h again, The resistance 7 performs the service for theswitch i that the resistance 1" serves for the switch As the shaft itrotates in the direction of the arrow, the brush 70 soon bridges thecontacts 70 and [0 thus closing the circuit of the field coil Z andarmature Z through the wires 3 and 5. The motor is arranged to tend torotate the shaft k oppositely to the direction of the arrow, but isover-powered by the motor M. As the arm 70 travels, the arm p drives thearm 29* until the brush 7) is brought over the gap between the sections,1? and 2 of the contact 77 at which time the win ing 8 becomesdleinergized and the fn'flthe' brush n, and the contact 119 to the.

winding 8 closes the switch S and the motor switch S opens. The switchesS and S also open their contact? immediately.

As the clutch winding G has also been deenergized, the shaft p and thegears 73, 19*", and 12 will be no longer driven by the shaft G, but willbe driven in the reverse direction vto drive the sections? and K andiotate the motor L againstits torque.

There being six equal gaps inthe contact ring they are apart. If thegears 2 and/ c have 85 and 60 teeth, respectively, it is clear that Whenthe arm p moves 60 or to the gap between the sections 10 and p of thecontact pl, the arm will move 85.

The inertia of the moving mechanism causes the arm p to drift 'to thesection p of the contact but until the controller arm is brought .to thecontact is; thewinding 5- cannot be energized, because the contact 19 isin circuit with the contact a? and not with the contact n. enough tobridge the gap, 8 will be deenergized as soon as 72 leaves 7). Noincrt-ia drift is necessary. j

The furnace top, having been revolved 85, is in position to bedischarged by the lowering of the usual bell. A fresh charge having beenplaced inthe furnace top aftert-he bell has been raised, the controllerarm n is moved so as to bring the brush 11) on the contact 11*.The-motor M and. the cut-out sections K and P will be rotated before.

The motor M will. operate till the arm p pushes the arm 1) to the. gapbetween the sections 7) and p, whereupon the winding 3 becomesdenergized', the switches S to S open, the motor M stops, the clutch Jis decnergized, the arm p drifts 'on to the section 7) and the motor L.returns-the arms is and i to their original positions, leaving the armbehind. The shaft it and therefore the furnace top, has during thissecond step of revolution turned 17 0. The sec6nd charge is at the endof'this step dropped.

into the furnace and a new chargedeposited m the furnace top. Thecontroller arm 12. is again moved onto the contact '11, causing arep'etition of the two steps above described except that the furnace topwill rot-ate 255 before the arm 79 comes to the gap between the sections1 and p on the contact-ring p; The operations are repeated hollibz'tum,the furnace top or other rotary mechanism rotating 85 further duringeach step than it. rotated during the next. preceding step;

If the brush 72 is wide that is, each successive operation automaticallystops the furnace top or its equivalent at a point 85 in advance of theprevious step. Seventy-two .operations will make a complete cycle and astop will have been made at each 5 point about the circle. By changingthe number of teeth in gear 19 to 87 the successix'e stops will be 87apart and it will require 120 stops to completeacycle, a. stop beingmade at each 3 point about the circle. Similarly, if the gear 2) has 89teeth, it will take 360 stops to complete a cycle, a stop being. made ateach degree By properly changing the relative point. number of teeth inthe gears 1) and If, any deslred arrangement of stops may be obtamed.The number of gaps in the contact rings 19 and k may be changed to suitvarious conditions. Gaps in the rings p" and 73" may 'also be made toalter the arrangement of the stops. The motor L is merely a torquedevice and may be replaced by other means operated by gravity, or aspring, or other force.

Fig. 3 does not differ from Fig. 1 except that the motor Land clutch Jhave been omitted and the control system has been adapted to a reversingmotor. It may be supposed that the motor M drives a revolvingore-bucket'whose cycle of motions is as follows: Starting from the zeroposition, the

bucket must move forward 85, stop, return to'the zero position, andstop. In the second forward movement, the bucket must move 170, stop,return to the zero position, and stop. Similarly each successive forwardmovement proceeds 85 in advance of the previous movement, to be followedby av return to the zero position.

In'Figs. 3 and 4, the cut-out mechanism K: and P are thesame as in Figs.1 and 2. F and F are a, pair of magnetically oper ated switches forgiving a forward rotation of the motor M and B and B are similarswitches for giving said motor abackward. rotation. S and aremagnetically operated switches for accelerating the motor in awell-known manner. The pairs of switches F, B and F B are connected bythe wellknown interlocking bars if and f H is the throttle or relay forcontrolling the switches S and S.

To describe the operation, suppose that the switch S is closed and allother parts of the apparatus are in the position as shown on Fig. '3,and the ore bucket, which lsto be revolved, 1s at the zero pos1t10n..SIIICG the shaft 7c" makes the same number of revolu-.

-ment of the cut-out arm '70 will {be considered in this description.The zero posi-;

tion is that shown 011* ig. 3. The master switch arm it always moves ina clockwlse direction over the fixed contacts a a, a", and n. Thecontacts 39, p and p are con nected to the master-controller contact if,and the contacts 10 p and p are connected to the master [controllercontact a.

The contact is is connected to the contacts the switch S through theauxiliary contacts of the switches S and S, the windings oi 5 theswitches F and F the contact .71 the brush p thecontact p, the wire 1,the contact of, the brush n and the contact ring it to the negative sideof the switch. This circuit closes the switches F and F completing themotor circuit as follows: from the positive side of the .switch Sthrough the resistance R, the resistance It, and the winding of thethrottle H, the field m of the motor M, the switch F, the armature m,and the switch F to the negative side of the switch S. As the motorspeeds up, the switch S will be closed automatically as were theswitches S and S shown in Fig. l.

The motor M is started and will stop when the arm p has left the contactp. The movement of the master-handle n to the contact a, causes thecontrolling circuit to pass through the windings of the switches B and Bthrough the contactlc, the brush 70 the contact 70 and the contact n tothe contact ring at. This circuit closes the switches B and B whichcomplete the motor circuit, the current pasing through the armature inthe reverse direction, causing the arms 70 and p to return to theiroriginal positions, where the arm 7: again causes the motor circuit tobe opened. \Vhen the bandle n is moved to the contact a, the windings ofthe switches F and F 2 are again energized, the current passing from thecontact 29*, the wire 2, and the contact n to the brush a and thecontact ring of the controller N. This starts the motor,again in aforward direction and it is stopped when the arm p leaves the contact 29the arm 71: having revolved through 170. hen the arm n is moved to thecontact a the switches B and B will be closed and the motor will againbe reversed, causing the return of the arms 72 and p to zero.

These operations described are repeated as desired, it requiring 72forward movements before the cycle begins to repeat. For each;

successive movement, the arm 70 is stopped 85 in advance of thepreceding one. By changing the number of teeth in the gears 01' thearrangement of the contacts on the 1 February, 1908.

cut-out sections K and P, any desired cycle may be obtained.

\Vith the construction shown on Figs. 3 and 4: it is not necessary thatthe arm p be carried across the gaps between consecutive contacts bymeans of the momentum of the moving mechanism, since the gaps may besmall enough to be bridged by the brush p and contact will always bemade with either one of the two sets of contacts.

My invention is not limited to the uses described, but is applicable toany apparatus wherein the described movements are required.

The means described may be variously modified while retaining the spiritof my in vention.

I claim- 1. The combination of an electric motor, a

mechanism driven thereby, a starting switch for said motor, a cut-outswitch for said motor, means for driving the movable member tosuccessive cut-out positions, and means for rendering the said cut-outdriving means inoperative for a predetermined travel of the drivenmechanism after each cut-out oper ation. i r 2. The combination of anelectric motor, a mechanism driven thereby, a startin switch for saidmotor, a cutout switch or said motor, means for driving the movablemember to successive cut-out. positions, and means for rendering thesaid cut-out driving means inoperative for a successively differentperiod after each cut-out operation.

3. The combination of an electric motor, a mechanism driven thereby, astarting switch for said motor, a series of spaced contacts, connectionsincluding said spaced and mov able contacts for making-said motoroperative, and means for driving said movable contact intermittentlypast the successive spaced contacts, and for rendering said movablecontact inactive for variable successive periods prior to its actuationby its said driving means.

' 4. In a rotary a tomatic cut-out, stationary contact membe s spacedwith reference to the successive degrees of angular travel required, amovable contact member cooperating with said stationary contact members,means for moving said movable contact forward at a definite angularratio with respect to the mechanism to be controlled, and automaticmeans for. returning said moving means to an initial position subsequentto each operation of the cut-out.

Signed at New York city, this 28th day JAY H. HALL.

\Vitnesses MARY F. GATES, KARL FENNING.

